Page 16 - VISION

Vitamin C is best known for its antioxidant properties and may be 維他命C公認是世界上最受歡迎的維他命，它的名聲是建基於它的
the most important water-soluble antioxidant in the body. 多面性以及驚人效用，它對促進身體功能帶來各種各樣的好處。

The capacity of vitamin C to support the immune system seems
to be common knowledge. In support of an elevated vitamin C 維他命C最聞名於世的是它的抗氧化功能，維他命C可能是人體
intake, an expert scientific panel recently recommended increasing 內最重要的水溶性抗氧化劑。
the current RDA for vitamin C from 60 mg to at least 100-200 mg
per day. Next, vitamin C may promote normal pulmonary health.
Part of the protective action of vitamin C appears to be due to its 維他命C能夠支援免疫系統已是人所共知的事。為支持提升維
antioxidant properties. Finally, some studies suggest that vitamin 他命C的攝取量，最近，科學專家小組建議把目前的每日建議劑
C supplementation will help to maintain healthy vision. 量（RDA）由60毫克的維他命C增至每日至少100至200毫克。其

次，維他命C可促進肺的正常健康。維他命C部分的保護作用似
Vitamin C helps support cardiovascular health in a few different
ways. It assists in promoting normal levels of cholesterol and 乎是因其抗氧化的功能。最後，研究顯示維他命C補充品將有助
normal blood pressure and promotes normal platelet activity. It also 於維持健康的視力。
promotes healthy triglyceride levels. Vitamin C protects against
LDL peroxidation by scavenging free radicals. Vitamin C helps 維他命C經由數種不同的途徑來支援心血管健康。它有助促進
maintain endothelial cell function by promoting the synthesis of 正常的膽固醇水平和血壓，促進正常的血小板活動，還可促進健
nitric oxide (also known as NO and EDRF for endothelium-derived
relaxing factor). As mentioned above, vitamin C helps preserve 康的三酸甘油酯水平。維他命C可清除自由基以保護並抵抗低密
intracellular reduced glutathione concentrations. This activity likely 度脂蛋白(LDL)過氧化反應。它透過促進一氧化氮的合成（亦稱
helps maintain nitric oxide levels and potentiates its vasoactive 為EDRF和NO內皮源性舒張因子），有助於保持血管內皮細胞的
effects, helping to maintain the integrity of blood vessels.
功能。如上所述，維他命C有助保持細胞內還原型穀胱甘肽的濃
Vitamin C may promote normal modulation of prostaglandin 度。這項活動可有助維持一氧化氮水平和促進血管張力的作用，
synthesis, which in turn promotes normal vasodilatory activity. 幫助維持血管的完整性。
As observed above, vitamin C helps maintain nitric oxide levels
and supports its ability to preserve the integrity of the blood 維他命C可促進正常地調節前列腺素的合成，從而能促進血管舒
vessels. There is an indication that vitamin C supports endothelial- 張的正常活動。如前所述，維他命C有助維持一氧化氮的水平，並
dependent vasodilation.
能支援維護血管的完整。有跡象顯示，維他命C能支援內皮依賴
Vitamin C plays a crucial role in maintaining healthy connective 性血管舒張。
tissues including collagen, elastin, fibronectin, proteoglycans,
bone matrix and elastin-associated fibrillin. Also, a lack of vitamin C 維他命C在維護健康的結締組織時擔當著關鍵的角色，其中包括
can cause general fatigue. Next, vitamin C helps moderate healthy 膠原蛋白、彈力蛋白、纖維連接蛋白、糖蛋白、骨基質和彈性蛋白
iron absorption, transport and storage. It promotes the normal
intestinal absorption of iron. 相關原纖維蛋白。此外，缺乏維他命C可引致全身疲勞。其次，維他
命C有助身體吸收、運送及儲存適量的鐵，促進腸道正常吸收鐵。
Beta Carotene (Vitamin A Precursor)
Vitamin A is a fat-soluble vitamin that is part of a family of β-胡蘿蔔素（維他命A）
compounds including retinol, retinal and beta-carotene. Beta- 維他命A是脂溶性的維他命，它屬於一群化合物的家族，此家族
carotene is also known as pro-vitamin A because it can be 還包含視黃醛、視黃醇及β-胡蘿蔔素。β-胡蘿蔔素又稱為維他
converted into vitamin A. The best sources of vitamin A includes
organ meats (such as liver and kidney) egg yolks, butter, carrot 命A原，因為它能轉化成維他命A。維他命A的最佳來源包括：內臟
juice, squash, sweet potatoes, spinach, peaches, fortified dairy 如肝及腎，蛋黃、牛油、甘荀汁、南瓜、蕃薯、菠菜、桃、加工的奶
products (such as milk and some margarines) and cod liver oil. 類製品如牛奶、部份植物牛油及鱈魚肝油。維他命A具有抗老化
Vitamin A has exhibited anti-aging and antioxidant activities.
Vitamin A helps to maintain vision. It promotes normal bone 及抗氧化功能。維他命A有助鞏固視力。 它還能促進骨骼成長及
growth and also contributes to a healthy immune system. 免疫系統健康。在表皮細胞分化、成長、繁殖、胚胎形成時的模
Vitamin A plays supports normal epithelial differentiation, growth, 式形成、骨骼發育、造血作用及腦部發育等多個範疇，維他命A均
reproduction, pattern formation during embryogenesis, bone 擔當重要的角色。兒童尤其容易受到維他命A缺乏症的影響。
development, hematopoiesis and brain development. Children
are particularly susceptible to the effects of vitamin A deficiency. 碳酸氫鈉鉀

Potassium (Bicarbonate) 富含鉀的食物包括新鮮蔬果，如香蕉、橙、哈密瓜、牛油果、未
Foods rich in potassium include fresh vegetables and fruits such 煮的菠菜、白菜及芹菜。
as bananas, oranges, cantaloupe, avocado, raw spinach, cabbage
and celery. 鉀是幫助維持體液平衡的重要巨量礦物質。在生化和生理過程
中發揮各種各樣的作用。除此之外，它可促進正常神經脈衝的
Potassium is an essential macromineral that helps to keep fluid
balance. It also plays a role in a wide variety of biochemical and 傳遞、心臟、骨骼肌和平滑肌的正常收縮、能量的正常產生、核
physiological processes. Among other things, it promotes the 酸的正常合成、保養內細胞的強壯的和維持血壓的正常。鉀能促
normal transmission of nerve impulses, the normal contraction 進肌肉的放鬆，支持胰島素正常的釋放。同時可促進正常糖原和
of cardiac, skeletal and smooth muscle, the normal production 蛋白質的合成。鉀是一種電解質可促進規律的心跳，在新陳代
of energy, the normal synthesis of nucleic acids, the maintenance
of intracellular tonicity and the maintenance of normal blood 謝的過程中尤為重要，能支援蛋白質、脂肪和碳水化合物釋放
pressure. Potassium promotes muscle relaxation, and supports 正常的能量。
normal insulin release. It also promotes normal glycogen and
protein synthesis. Potassium is an electrolyte that promotes proper 鉀同時可促進正常調節身體的水份平衡，協助身體把廢物正常
heartbeat, and it is important in supporting the normal release of
energy from protein, fat, and carbohydrates during metabolism.